The Nigerian Communications Commission (NCC) on Monday said it would sanction 13 telecommunications operators for failing to comply with the '2442 Do Not Disturb (DND)' directive on unsolicited telemarketing.

"After several meetings, including those it held with the network providers, it became necessary to issue the latest ultimatum to redress the menace of incessant unsolicited text messages and phone calls for telemarketing via the various networks,'' he said.

"NCC has therefore, asked these network providers to ensure that information on the Do Not Disturb service should be disseminated after every revenue-generating activity via the End of Call Notification (EOCN).